Error: no such namespace:sys

Error: no such namespace:sys
at pro.route (F:&#92;cosmosbox&#92;cb-product&#92;server&#92;game-server&#92;node_modules&#92;pomelo-rpc&#92;lib&#92;rpc-server&#92;dispatcher.js:31:30)
at F:&#92;cosmosbox&#92;cb-product&#92;server&#92;game-server&#92;node_modules&#92;pomelo-rpc&#92;lib&#92;rpc-server&#92;gateway.js:23:16
at processMsg (F:&#92;cosmosbox&#92;cb-product&#92;server&#92;game-server&#92;node_modules&#92;pomelo-rpc&#92;lib&#92;rpc-server&#92;acceptors&#92;ws-acceptor.js:134:15)
at processMsgs (F:&#92;cosmosbox&#92;cb-product&#92;server&#92;game-server&#92;node_modules&#92;pomelo-rpc&#92;lib&#92;rpc-server&#92;acceptors&#92;ws-acceptor.js:158:5)
at Socket.&lt;anonymous&gt; (F:&#92;cosmosbox&#92;cb-product&#92;server&#92;game-server&#92;node_modules&#92;pomelo-rpc&#92;lib&#92;rpc-server&#92;acceptors&#92;ws-acceptor.js:51:11)
at Socket.EventEmitter.emit [as $emit] (events.js:95:17)
at SocketNamespace.handlePacket (F:&#92;cosmosbox&#92;cb-product&#92;server&#92;game-server&#92;node_modules&#92;socket.io&#92;lib&#92;namespace.js:335:22)
at Manager.onClientMessage (F:&#92;cosmosbox&#92;cb-product&#92;server&#92;game-server&#92;node_modules&#92;socket.io&#92;lib&#92;manager.js:488:38)
at WebSocket.Transport.onMessage (F:&#92;cosmosbox&#92;cb-product&#92;server&#92;game-server&#92;node_modules&#92;socket.io&#92;lib&#92;transport.js:387:20)
at Parser.&lt;anonymous&gt; (F:&#92;cosmosbox&#92;cb-product&#92;server&#92;game-server&#92;node_modules&#92;socket.io&#92;lib&#92;transports&#92;websocket&#92;hybi-16.js:39:10)